Recreating a Roman Garum Factory from Pompeian Vats

Garum was one of the defining tastes of Roman cooking: intensely savoury, aromatic, salty and capable of transforming a plain dish with a few drops. It was made by fermenting fish, fish trimmings and salt, often with herbs or spices, then collecting the liquid that drained from the mixture. The solid residue could also be pressed or used as a seasoning. Learn more about Ilmondodiortolandia.com.

At Pompeii, this was more than a household technique. Fish-sauce production formed part of a commercial food economy connected to workshops, storage vessels, transport jars and busy urban markets. Reconstructing a Roman garum facility therefore means studying architecture and ingredients together, rather than treating the sauce as an isolated recipe.

The surviving vats are especially valuable because they reveal scale and workflow. Their size, arrangement and relationship to drains or work areas can suggest how raw fish was handled, where brine was mixed, and how the finished liquor was separated. Archaeology cannot provide every missing detail, so an experimental reconstruction must distinguish evidence from informed interpretation.

For a modern Australian audience, the project also raises practical questions. Fish supply, food labelling, council requirements, refrigeration, summer heat and safe fermentation all shape how an ancient process can be explored today. The aim is to recreate the sensory logic of a Roman workshop without pretending that a backyard vessel can reproduce every condition of Pompeian production.

What The Pompeian Vats Can Tell Us

Roman fish-sauce workshops were organised around containers that could hold large quantities of fish and salt for extended periods. The vats associated with Pompeian production were probably masonry-lined or otherwise durable installations, suited to repeated use. Their form would have made it possible to layer ingredients, allow enzymatic breakdown to occur and collect liquid as the mixture softened.

The word “garum” covered several related products, and ancient writers did not always use the terms consistently. Liquamen could refer to a refined fish sauce, while allec described a thicker or less filtered material. The final product depended on the type of fish, the proportion of salt, the length of maturation and the degree of filtration. A factory could therefore have produced several grades for different customers.

The location of production matters as much as the recipe. A workshop needed access to fish, salt, water, fuel, containers and labour. Pompeii’s position near the Bay of Naples connected it to maritime trade and regional agriculture. Amphorae could carry fish sauce far beyond the production site, while smaller vessels allowed households and taverns to purchase manageable quantities.

A reconstruction can represent this sequence with scaled-down vessels: a receiving area for fish, a mixing vat, a maturation container and a settling or straining station. The arrangement should communicate movement through the workshop rather than present one mysterious pot as the entire technology.

Fish, Salt And The Work Of Fermentation

Roman producers probably used small oily fish such as anchovies, sardines and sprats, along with trimmings from larger fish. Whole fish could be layered with salt, while heads, entrails and frames supplied enzymes that helped break down the flesh. The process was not simply putrefaction; it was a controlled transformation in which salt suppressed many unwanted microbes while fish enzymes released savoury amino compounds.

Salt quality and quantity were essential. Mediterranean producers had access to coastal saltworks, and salt could be traded in bulk. In Australia, the equivalent experiment might begin with sustainably sourced sardines or pilchards from a fishmonger in Adelaide, Sydney or Perth, paired with food-grade salt rather than pool salt or chemically treated products. Ingredient provenance should be recorded because species and fat content affect the result.

Ancient recipes sometimes mention oregano, thyme, mint, dill or other aromatics. These may have contributed fragrance, preservation and regional identity, although they should not be added automatically to every reconstruction. A plain fish-and-salt batch offers a clearer baseline, while a second vessel can test the effect of herbs. The comparison is more informative than a single heavily flavoured mixture.

Modern home fermentation requires particular caution. Fish can accumulate histamine, and a salty environment does not guarantee safety if the process is poorly controlled. An educational model may use sealed visual substitutes, commercially produced fish sauce or a laboratory-supervised batch. Anyone handling actual seafood should follow current Australian food-safety advice and avoid serving an experimental product to the public without a validated process.

Building A Scaled Workshop

A useful reconstruction begins with proportion rather than appearance. A full Roman vat could contain hundreds of litres, but a small ceramic crock or food-grade container can demonstrate layering, drainage and filtration. The vessel should be non-reactive, easy to clean and clearly marked. Modern plastic may be historically plain, yet it can be safer and more practical for a teaching demonstration than porous, untested pottery.

The workshop can include replica amphorae, baskets, scoops, weights and a raised draining platform. Visitors should be able to see where fish entered, how salt was distributed and how liquid moved away from the solid mass. A transparent observation vessel can explain settling without exposing the food to unnecessary handling.

The visual language of the reconstruction should remain honest. A masonry vat built for a museum display may show the Pompeian scale, while the actual edible experiment takes place in a certified container. Labels can identify which elements are archaeological, which are based on literary evidence and which are modern safety adaptations.

Other ancient food technologies help place the sauce in context. The reconstructed Roman bread moulds show how shape, heat and production scale can be investigated through material remains. Bread and fish sauce belonged to different branches of the food economy, yet both reveal the practical intelligence behind Roman kitchens and workshops.

From Pompeii To An Australian Food Landscape

An Australian version of the project should acknowledge a very different coastline and regulatory setting. Fish markets in Sydney, Melbourne and Brisbane offer access to species that may resemble Roman small fish, but availability changes by season, fishing rules and supply chain. Substituting local species can be valuable, provided the change is documented rather than presented as a historically exact ingredient.

The climate also matters. A warm Pompeian summer and an Australian heatwave are not interchangeable conditions. In Darwin or northern Queensland, outdoor maturation could become dangerously rapid, while a cool Melbourne shed would produce a different rate of enzymatic activity. Temperature, salt concentration, vessel exposure and duration must therefore be monitored instead of relying on a vague idea of “sun fermentation”.

Australian food businesses and public demonstrations may fall under requirements administered through Food Standards Australia New Zealand, state or territory authorities and local councils. A commercial workshop, market stall or museum tasting may need food-business registration, approved premises, traceability records and a documented food-safety plan. Home experimentation is a different category, but it still carries responsibility when food is shared.

Labelling is equally important. A bottle should identify ingredients, allergens and the fact that it is an experimental reconstruction. Fish is a regulated allergen in Australia, and statements about origin or sustainability must be accurate. A producer using modern anchovies and imported salt should not imply that the liquid came from ancient Pompeii or was made by an unchanged Roman method.

Tasting Garum As Historical Evidence

Garum should be tasted as a seasoning, not poured like a modern soup. A small amount can be diluted into broth, whisked with vinegar and oil, or added to lentils, roasted vegetables and grilled fish. Roman cooks used fish sauce across social settings, from elite dining to ordinary household meals, so its presence does not automatically indicate luxury.

The flavour profile can be described through saltiness, marine aroma, sweetness, bitterness, umami and persistence. A clear amber liquid may seem refined, while a cloudy, darker product may retain more solids and have a stronger smell. These differences can help explain why ancient writers distinguished between grades and by-products.

Garum also belonged to a wider culture of feasting, sacrifice and exchange. A discussion of Delphi temple feast can broaden the comparison by showing how food, ritual space and communal identity operated in the Greek world. The comparison should preserve cultural differences while recognising that ancient food was often inseparable from religion, status and hospitality.

Modern cooks may recognise the same fermented savouriness in Asian fish sauces, though historical continuity should not be assumed. A useful cross-cultural comparison can include fermented fish sauces from other culinary traditions, allowing tasters to notice differences in salt, aroma, clarity and ageing. This places Roman garum within a global history of preserving seafood without collapsing distinct traditions into one category.

The finished installation can invite visitors to connect smell, texture and evidence. Displaying a map of Mediterranean trade, drawings of the vats, replica containers and a carefully labelled tasting spoon turns the reconstruction into an argument about food systems. For those documenting the project online, clear sourcing and responsible publishing practices are set out in the site’s legal information.

Use the Pompeian vats as a starting point for research, build the workshop at a scale that can be inspected, and document every modern substitution. A careful reconstruction can make Roman fish-sauce production tangible while respecting archaeological uncertainty, Australian food law and the safety of everyone who encounters the experiment.